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# setObject:atIndexedSubscript:

Sets the state of the specified vertex buffer layout.

```
- (void) setObject:(MTLVertexBufferLayoutDescriptor *) bufferDesc atIndexedSubscript:(NSUInteger) index;
```

## Parameters

`bufferDesc`

A descriptor that contains vertex buffer layout state.

`index`

An index in the array of vertex buffer layouts.

## Discussion

If this method is called with `nil` for `bufferDesc` for any legal index, the [`MTLVertexBufferLayoutDescriptor`](/documentation/Metal/MTLVertexBufferLayoutDescriptor) object in the array is set to the default values.

---

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